Testing an external script

How does one pass a command line, including arguments, from a Ruby
script to the shell. Specifically

  some_method("#{@script} -o #{@outfile} -f #{@format}")

I have tried Kernel.` Kernel.system, %x but have not hit on a correct
syntax yet.

By "testing" you just mean "running", right?

James Byrne wrote:

How does one pass a command line, including arguments, from a Ruby
script to the shell. Specifically

  some_method("#{@script} -o #{@outfile} -f #{@format}")

I have tried Kernel.` Kernel.system, %x but have not hit on a correct
syntax yet.

It's just system(""). If your variables are valid, if your script is in the current right folder, and if your @outfile has no spaces in it, then the above should work with system("").

What error message do you get?

And note you can use popen() to route the output into a string in your program...